Valve clack positioning structure of inner pin shaft check valve

Abstract

A valve clack positioning structure of an inner pin shaft check valve comprises a valve body, a connecting block, a valve clack, a rocker, a fastening bolt and a pin shaft, a boss is arranged on the side wall of the valve body, the connecting block is attached to the surface of the boss, the valve clack is connected to the rocker, one end of the rocker is rotatably connected to the connecting block, and the other end of the rocker is connected to the fastening bolt. The connecting block and the boss are respectively provided with threaded holes which are equal in number and correspond to each other in position, the connecting block is communicated with the threaded holes in the boss, the fastening bolts are connected in the threaded holes in a threaded mode to connect the connecting block with the boss, and the connecting block and the boss are respectively provided with pin holes which are equal in number and correspond to each other in position. The connecting block is communicated with the pin hole in the boss, and the pin shaft is inserted into the pin hole in the connecting block and the pin hole in the boss to bear shearing force of the connecting block and the boss. Through the arrangement of the pin hole and the pin shaft, the phenomenon that a gap between a bolt hole and a bolt is large, and the phenomenon of gap deviation occurs in the valve using process is avoided, and the pin hole is convenient to machine compared with a reamed hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of inner pin shaft check valves, and particularly relates to a valve flap positioning structure of an inner pin shaft check valve. Background Art

[0002] As a commonly used check valve in the industry, the internal pin shaft check valve currently mostly adopts the following two structures: Figure 3 As shown, 1. Bolt fastening structure: a boss 200 is cast on the valve body 100, the valve disc rocker 300 is connected to the boss 200 through a connecting block 400, a bolt hole is processed on the connecting block 400, and a threaded hole matching the bolt hole is processed on the boss 200, and fastened by a fastening bolt 500; Figure 4 As shown, second, the bolt fastening structure for the tapped hole: a boss 200 is cast on the valve body 100, and the valve disc rocker 300 is connected to the boss 200 through a connecting block 400. The connecting block 400 is provided with a tapped hole, and a threaded hole is processed on the boss 200. After completion, it is positioned and fastened by a tapped bolt 600.

[0003] However, the two existing structures have the following disadvantages: 1. Bolt fastening structure: This structure only has a fastening function but no positioning function. The gap between the bolt hole and the bolt 500 is large. It is inevitable that the gap will deviate during the use of the valve, thereby affecting the valve disc seal; 2. Bolt fastening structure for reamed holes: This structure is an integrated structure for valve disc positioning and fastening. The reamed holes must be drilled when the valve disc rocker 300 is assembled, and the processing accuracy requirements for the reamed holes are too high, resulting in low drilling efficiency or the inability to complete the task manually. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model aims to provide a valve disc positioning structure for an inner pin shaft check valve.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A valve disc positioning structure of an internal pin shaft check valve comprises a valve body, a connecting block, a valve disc, a rocker, a fastening bolt and a pin shaft, a boss is arranged on the side wall of the valve body, the connecting block is fitted on the surface of the boss, the valve disc is connected to the rocker, one end of the rocker is rotatably connected to the connecting block, the connecting block and the boss are respectively provided with threaded holes of equal number and corresponding positions, the connecting block is communicated with the threaded holes on the boss, the fastening bolt is threadedly connected in the threaded hole to connect the connecting block and the boss, the connecting block and the boss are respectively provided with pin holes of equal number and corresponding positions, the connecting block is communicated with the pin holes on the boss, and the pin shaft is inserted in the pin holes on the connecting block and the boss to withstand the shear force of the connecting block and the boss.

[0007] Preferably, the pin shaft is inserted into the pin holes on the connecting block and the boss with interference fit.

[0008] Preferably, the pin hole is a through hole on one of the connecting block and the boss, and is a blind hole on the other, and a baffle is covered on the end of the through hole away from the blind hole, and the baffle is fixed to the connecting block or boss surface by fastening bolts.

[0009] Preferably, the pin holes on the connecting block and the boss are through holes, and the ends of the pin holes of the connecting block and the boss away from each other are respectively covered with baffles, and the baffles are fixed to the connecting block and the boss surface by fastening bolts.

[0010] Preferably, the connecting block is arranged on the upper surface of the boss.

[0011] Beneficial effects of the utility model

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] The utility model positions the connecting block on the boss with a pin shaft, and fastens the connecting block to the boss with a fastening bolt, and by arranging the pin hole and the pin shaft, a large gap between the bolt hole and the bolt is avoided, which prevents the gap from deviation during the use of the valve. In addition, the pin hole is easier to process than the reamed hole, which effectively improves the processing efficiency and does not cause the situation that cannot be completed manually. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the prior art one;

[0017] Figure 4 It is a structural schematic diagram of the prior art 2. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1-2 The utility model provides a technical solution: a valve disc positioning structure of an internal pin shaft check valve, comprising a valve body 1, a connecting block 2, a valve disc 3, a rocker 4, a fastening bolt 5 and a pin shaft 6. A boss 7 is provided on the side wall of the valve body 1, the connecting block 2 is fitted on the surface of the boss 7, the valve disc 3 is connected to the rocker 4, one end of the rocker 4 is rotatably connected to the connecting block 2, the connecting block 2 and the boss 7 are respectively provided with threaded holes of equal number and corresponding positions, the connecting block 2 and the threaded holes on the boss 7 are communicated, the fastening bolt 5 is threadedly connected in the threaded hole to connect the connecting block 2 and the boss 7, the connecting block 2 and the boss 7 are respectively provided with pin holes of equal number and corresponding positions, the connecting block 2 and the pin holes on the boss 7 are communicated, and the pin shaft 6 is inserted in the pin holes on the connecting block 2 and the boss 7 to withstand the shear force of the connecting block 2 and the boss 7.

[0022] The utility model positions the connecting block 2 on the boss 7 with a pin shaft 6, and fastens the connecting block 2 on the boss 7 with a fastening bolt 5. By providing the pin hole and the pin shaft 6, a large gap between the bolt hole and the bolt is avoided, which prevents the gap from deviating during the use of the valve. In addition, the pin hole is easier to process than the reamed hole, which effectively improves the processing efficiency and does not cause the situation that cannot be completed manually.

[0023] Furthermore, the pin shaft 6 is inserted into the pin holes on the connecting block 2 and the boss 7 with interference fit, so as to prevent the connecting block 2 and the boss 7 from relative displacement.

[0024] Furthermore, the pin hole is a through hole on one of the connecting block 2 and the boss 7, and a blind hole on the other, and a baffle 8 is covered at the end of the through hole away from the blind hole, and the baffle 8 is fixed to the surface of the connecting block 2 or the boss 7 by fastening bolts 5; or the pin holes on the connecting block 2 and the boss 7 are both through holes, and the ends of the pin holes of the connecting block 2 and the pin holes of the boss 7 away from each other are respectively covered with baffles 8, and the baffles 8 are fixed to the surfaces of the connecting block 2 and the boss 7 by fastening bolts 5, thereby preventing the pin shaft 6 from falling off from the pin hole.

[0025] Furthermore, the connecting block 2 is arranged on the upper surface of the boss 7, and the connecting block 2 is pressed against the upper surface of the boss 7 by the valve disc 3, the rocker 4 and its own gravity. The boss 7 supports the connecting block 2 to prevent the fastening bolts 5 connecting the connecting block 2 and the boss 7 from loosening.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inner pin shaft check valve disc positioning structure, characterized in that: The valve body (1) comprises a valve body (1), a connecting block (2), a valve flap (3), a rocker (4), a fastening bolt (5) and a pin (6); a boss (7) is arranged on the side wall of the valve body (1); the connecting block (2) is fitted on the surface of the boss (7); the valve flap (3) is connected to the rocker (4); one end of the rocker (4) is rotatably connected to the connecting block (2); the connecting block (2) and the boss (7) are respectively provided with threaded holes of equal number and corresponding positions; The threaded holes on the connecting block (2) and the boss (7) are in communication, the fastening bolts (5) are threadedly connected in the threaded holes to connect the connecting block (2) and the boss (7), the connecting block (2) and the boss (7) are respectively provided with equal numbers of pin holes in corresponding positions, the pin holes on the connecting block (2) and the boss (7) are in communication, and the pin shaft (6) is inserted into the pin holes on the connecting block (2) and the boss (7) to withstand the shear force of the connecting block (2) and the boss (7).

2. The inner pin shaft check valve disc positioning structure according to claim 1, characterized in that: The pin shaft (6) is inserted into the pin holes on the connecting block (2) and the boss (7) by interference fit.

3. The inner pin shaft check valve disc positioning structure according to claim 1, characterized in that: The pin hole is a through hole on one of the connection block (2) and the boss (7), and is a blind hole on the other. A baffle (8) is covered at the end of the through hole away from the blind hole. The baffle (8) is fixed to the surface of the connection block (2) or the boss (7) by means of a fastening bolt (5).

4. The inner pin shaft check valve disc positioning structure according to claim 1, characterized in that: The pin holes on the connecting block (2) and the boss (7) are both through holes, and the ends of the pin holes of the connecting block (2) and the boss (7) that are away from each other are respectively covered with baffles (8), and the baffles (8) are fixed to the surfaces of the connecting block (2) and the boss (7) by fastening bolts (5).

5. The inner pin shaft check valve disc positioning structure according to claim 1, characterized in that: The connecting block (2) is arranged on the upper surface of the boss (7).

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